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pellepl / spiffs

Wear-leveled SPI flash file system for embedded devices
MIT License
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How fast SPIFFS is (need advice) #268

Open taraskornuta opened 4 years ago

taraskornuta commented 4 years ago

Hi. My system configuration: Chip: GD25Q16C MCU: STM32L071, freq 16MHz, SPI clock 8Mhz I consider to using SPIFFS in my project and as an alternative for LittleFS. So currently now I'm using the LittleFS to store logs. Each log entry have always the same size (46bytes). They are all stored in one file and file uses like FIFO buffer. The size of file around 200K. I faced with issue in LittleFS, when the file becomes bigger, then file close operation becomes slower and slower with each execution

I try to setup SPIFFS in my project, using the example from wiki. And try to write/read a "Hello world". This operation took around 3secs. Questions is: Is it possible to lower somehow execution of this operation, by tune the FS settings? Is this time to make mount->open file->write data->read data ->close file->unmount will be increasing constantly with each file operation as in LittleFS?

ikalogic commented 4 years ago

From my exprience, the time does not increase with time.

You will get better perofrmance by having biffer logical pages and sectors, on the expense of flash memory usage.